| 摘要 |
A double-safety arrangement for a self-propelled, hand-guided machine such as a duplex-vibratory roller equipped with a control column for facilitating control of the machine by an operator. The machine is also equipped with switching linkage actuable for engaging the machine for forward and rearward travel. The linkage has a neutral position to which it returns when no longer actuated for travel and whereat the machine is disengaged and comes to a halt. The double-safety arrangement includes an operating lever having a neutral center position and at least first and second travel positions for forward and rearward travel, respectively. A latching assembly is movable into a latched condition for transmitting the movements of the operating lever to the linkage thereby actuating the latter and into an unlatched condition whereat the linkage means is no longer actuable by the lever. The latching assembly includes a deadman's handle for holding the assembly in the latched condition so long as the handle is held in its actuated position. An override shutoff member provides an override function for bringing the latching assembly into the unlatched condition even while the operator holds the deadman's lever in the actuated position. The override shutoff member can be actuated by the operator, for example, by accidentally falling or when the machine comes into contact with a stationary object. |
